HttpHelper類的調(diào)用方法詳解
更新時(shí)間：2017年06月30日 10:07:00 作者：幻影星辰
這篇文章主要為大家詳細(xì)介紹了HttpHelper類的使用方法，HttpHelper類及調(diào)用，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下
本文實(shí)例為大家分享了HttpHelper類的方法使用，供大家參考，具體內(nèi)容如下
首先列出HttpHelper類
/// <summary>
/// Http操作類
/// </summary>
public class HttpHelper
{
private static log4net.ILog mLog = log4net.LogManager.GetLogger("HttpHelper");
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool InternetGetCookie(string lpszUrlName, string lbszCookieName, StringBuilder lpszCookieData, ref int lpdwSize);
public static StreamReader mLastResponseStream = null;
public static System.IO.StreamReader LastResponseStream
{
get { return mLastResponseStream; }
}
private static CookieContainer mCookie = null;
public static CookieContainer Cookie
{
get { return mCookie; }
set { mCookie = value; }
}
private static CookieContainer mLastCookie = null;
public static HttpWebRequest CreateWebRequest(string url, HttpRequestType httpType, string contentType, string data, Encoding requestEncoding, int timeout, bool keepAlive)
{
if (String.IsNullOrWhiteSpace(url))
{
throw new Exception("URL為空");
}
HttpWebRequest webRequest = null;
Stream requestStream = null;
byte[] datas = null;
switch (httpType)
{
case HttpRequestType.GET:
case HttpRequestType.DELETE:
if (!String.IsNullOrWhiteSpace(data))
{
if (!url.Contains('?'))
{
url += "?" + data;
}
else url += "&" + data;
}
if(url.StartsWith("https:"))
{
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
}
webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Method = Enum.GetName(typeof(HttpRequestType), httpType);
if (contentType != null)
{
webRequest.ContentType = contentType;
}
if (mCookie == null)
{
webRequest.CookieContainer = new CookieContainer();
}
else
{
webRequest.CookieContainer = mCookie;
}
if (keepAlive)
{
webRequest.KeepAlive = keepAlive;
webRequest.ReadWriteTimeout = timeout;
webRequest.Timeout = 60000;
mLog.Info("請(qǐng)求超時(shí)時(shí)間..." + timeout);
}
break;
default:
if (url.StartsWith("https:"))
{
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
}
webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Method = Enum.GetName(typeof(HttpRequestType), httpType);
if (contentType != null)
{
webRequest.ContentType = contentType;
}
if (mCookie == null)
{
webRequest.CookieContainer = new CookieContainer();
}
else
{
webRequest.CookieContainer = mCookie;
}
if (keepAlive)
{
webRequest.KeepAlive = keepAlive;
webRequest.ReadWriteTimeout = timeout;
webRequest.Timeout = 60000;
mLog.Info("請(qǐng)求超時(shí)時(shí)間..." + timeout);
}
if (!String.IsNullOrWhiteSpace(data))
{
datas = requestEncoding.GetBytes(data);
}
if (datas != null)
{
webRequest.ContentLength = datas.Length;
requestStream = webRequest.GetRequestStream();
requestStream.Write(datas, 0, datas.Length);
requestStream.Flush();
requestStream.Close();
}
break;
}
//mLog.InfoFormat("請(qǐng)求 Url:{0},HttpRequestType:{1},contentType：{2},data:{3}", url, Enum.GetName(typeof(HttpRequestType), httpType), contentType, data);
return webRequest;
}
public static CookieContainer GetLastCookie()
{
return mLastCookie;
}
/// <summary>
/// 設(shè)置HTTP的Cookie，以后發(fā)送和請(qǐng)求用此Cookie
/// </summary>
/// <param name="cookie">CookieContainer</param>
public static void SetHttpCookie(CookieContainer cookie)
{
mCookie = cookie;
}
private static HttpWebRequest mLastAsyncRequest = null;
public static HttpWebRequest LastAsyncRequest
{
get { return mLastAsyncRequest; }
set { mLastAsyncRequest = value; }
}
/// <summary>
/// 發(fā)送請(qǐng)求
/// </summary>
/// <param name="url">請(qǐng)求Url</param>
/// <param name="httpType">請(qǐng)求類型</param>
/// <param name="contentType">contentType：application/x-www-form-urlencoded</param>
/// <param name="data">請(qǐng)求數(shù)據(jù)</param>
/// <param name="encoding">請(qǐng)求數(shù)據(jù)傳輸時(shí)編碼格式</param>
/// <returns>返回請(qǐng)求結(jié)果</returns>
public static string SendRequest(string url, HttpRequestType httpType, string contentType, string data, Encoding requestEncoding, Encoding reponseEncoding, params AsyncCallback[] callBack)
{
int timeout = 0;
bool keepAlive = false;
if (callBack != null && callBack.Length > 0 && callBack[0] != null)
{
keepAlive = true;
timeout = 1000*60*60;
mLog.Info("寫入讀取超時(shí)時(shí)間..." + timeout);
}
// mLog.Info("開始創(chuàng)建請(qǐng)求....");
HttpWebRequest webRequest = CreateWebRequest(url, httpType, contentType, data, requestEncoding,timeout,keepAlive);
string ret = null;
// mLog.Info("創(chuàng)建請(qǐng)求結(jié)束....");
if (callBack != null && callBack.Length > 0 && callBack[0] != null)
{
// mLog.Info("開始異步請(qǐng)求....");
mLastAsyncRequest = webRequest;
webRequest.BeginGetResponse(callBack[0], webRequest);
}
else
{
// mLog.Info("開始同步請(qǐng)求....");
StreamReader sr = new StreamReader(webRequest.GetResponse().GetResponseStream(), reponseEncoding);
ret = sr.ReadToEnd();
sr.Close();
}
mLastCookie = webRequest.CookieContainer;
//mLog.InfoFormat("結(jié)束請(qǐng)求 Url:{0},HttpRequestType:{1},contentType：{2},結(jié)果：{3}", url, Enum.GetName(typeof(HttpRequestType), httpType), contentType,ret);
return ret;
}
/// <summary>
/// Http上傳文件
/// </summary>
public static string HttpUploadFile(string url, string path)
{
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
{
// 設(shè)置參數(shù)
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.AllowWriteStreamBuffering = false;
request.SendChunked = true;
request.Method = "POST";
request.Timeout = 300000;
string boundary = DateTime.Now.Ticks.ToString("X"); // 隨機(jī)分隔線
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
int pos = path.LastIndexOf("\\");
string fileName = path.Substring(pos + 1);
//請(qǐng)求頭部信息
StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
request.ContentLength = itemBoundaryBytes.Length + postHeaderBytes.Length + fs.Length + endBoundaryBytes.Length;
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
int bytesRead = 0;
int arrayLeng = fs.Length <= 4096 ? (int)fs.Length : 4096;
byte[] bArr = new byte[arrayLeng];
int counter = 0;
while ((bytesRead = fs.Read(bArr, 0, arrayLeng)) != 0)
{
counter++;
postStream.Write(bArr, 0, bytesRead);
}
postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
}
//發(fā)送請(qǐng)求并獲取相應(yīng)回應(yīng)數(shù)據(jù)
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
//直到request.GetResponse()程序才開始向目標(biāo)網(wǎng)頁(yè)發(fā)送Post請(qǐng)求
using (Stream instream = response.GetResponseStream())
{
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
//返回結(jié)果網(wǎng)頁(yè)（html）代碼
string content = sr.ReadToEnd();
return content;
}
}
}
}
public static string HttpUploadFile(string url, MemoryStream files, string fileName)
{
using (MemoryStream fs = files)
{
// 設(shè)置參數(shù)
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.AllowWriteStreamBuffering = false;
request.SendChunked = true;
request.Method = "POST";
request.Timeout = 300000;
string boundary = DateTime.Now.Ticks.ToString("X"); // 隨機(jī)分隔線
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
//請(qǐng)求頭部信息
StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
request.ContentLength = itemBoundaryBytes.Length + postHeaderBytes.Length + fs.Length + endBoundaryBytes.Length;
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
int bytesRead = 0;
int arrayLeng = fs.Length <= 4096 ? (int)fs.Length : 4096;
byte[] bArr = new byte[arrayLeng];
int counter = 0;
fs.Position = 0;
while ((bytesRead = fs.Read(bArr, 0, arrayLeng)) != 0)
{
counter++;
postStream.Write(bArr, 0, bytesRead);
}
postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
}
//發(fā)送請(qǐng)求并獲取相應(yīng)回應(yīng)數(shù)據(jù)
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
//直到request.GetResponse()程序才開始向目標(biāo)網(wǎng)頁(yè)發(fā)送Post請(qǐng)求
using (Stream instream = response.GetResponseStream())
{
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
//返回結(jié)果網(wǎng)頁(yè)（html）代碼
string content = sr.ReadToEnd();
return content;
}
}
}
}
#region public static 方法
/// <summary>
/// 將請(qǐng)求的流轉(zhuǎn)化為字符串
/// </summary>
/// <param name="info"></param>
/// <returns></returns>
public static string GetStr(Stream info)
{
string result = "";
try
{
using (StreamReader sr = new StreamReader(info, System.Text.Encoding.UTF8))
{
result = sr.ReadToEnd();
sr.Close();
}
}
catch
{
}
return result;
}
/// <summary>
/// 參數(shù)轉(zhuǎn)碼
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string stringDecode(string str)
{
return HttpUtility.UrlDecode(HttpUtility.UrlDecode(str, System.Text.Encoding.GetEncoding("UTF-8")), System.Text.Encoding.GetEncoding("UTF-8"));
}
/// <summary>
/// json反序列化
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="json"></param>
/// <returns></returns>
public static T Deserialize<T>(string json)
{
try
{
T obj = Activator.CreateInstance<T>();
using (MemoryStream ms = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(json)))
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
return (T)serializer.ReadObject(ms);
}
}
catch
{
return default(T);
}
}
#endregion
public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{ // 總是接受
return true;
}
}
public enum HttpRequestType
{
POST,
GET,
DELETE,
PUT,
PATCH,
HEAD,
TRACE,
OPTIONS
}
然后列出HttpHelper的調(diào)用
1、不帶參數(shù)調(diào)用
public bool ConnectServer()
{
try
{
string url = "https://i.cnblogs.com";
string xml = HttpHelper.SendRequest(url, HttpRequestType.POST, null, null, Encoding.UTF8, Encoding.UTF8);
NormalResponse nr = HuaweiXMLHelper.GetNormalResponse(xml);
if (nr.Code == "0")
{
HttpHelper.SetHttpCookie(HttpHelper.GetLastCookie());
mIsConnect = true;
return true;
}
else
{
mIsConnect = false;
return false;
}
}
catch (System.Exception ex)
{
mIsConnect = false;
return false;
}
}
2.帶參數(shù)調(diào)用
private bool HandleIntelligentTask(string taskId,bool bStop)
{
try
{
if (!mIsConnect)
{
return false;
}
StringBuilder sb = new StringBuilder();
sb.AppendFormat("<request>\r\n");
sb.AppendFormat("<task_id>{0}</task_id>\r\n", taskId);//<!-- task-id為調(diào)用方生成的UUID或其它串 -->
sb.AppendFormat("<status>{0}</status>\r\n",bStop?0:1);
sb.AppendFormat("</request>\r\n");
string xml = sb.ToString();
string url = mIAServerUrl + "/sdk_service/rest/video-analysis/handle-intelligent-analysis";
string xml2 = HttpHelper.SendRequest(url, HttpRequestType.POST, "text/plain;charset=utf-8", xml, Encoding.UTF8, Encoding.UTF8);
NormalResponse nr = HuaweiXMLHelper.GetNormalResponse(xml2);
if (nr.Code == "0")
{
return true;
}
else
{
return false;
}
}
catch (System.Exception ex)
{
return false;
}
}
3.異步調(diào)用
private void ReStartAlarmServer(List<string> list, string alarmUrl, Thread[] listThread)
{
StopAlarm(alarmUrl, listThread);
listThread[0]= new Thread(new ThreadStart(delegate()
{
try
{
if (!mIsConnect)
{
mLog.Error("未登錄！--ReStartAlarmServer-結(jié)束！");
return;
}
mLog.Info("ReStartAlarmServer開始報(bào)警連接....");
if (String.IsNullOrWhiteSpace(alarmUrl)) return;
mLog.InfoFormat("ReStartAlarmServer請(qǐng)求報(bào)警：URL={0}", alarmUrl);
string xml = "task-id=0";
string xml2 = HttpHelper.SendRequest(alarmUrl, HttpRequestType.POST, "application/x-www-form-urlencoded", xml, Encoding.UTF8, Encoding.UTF8, AlarmCallBack);
mLog.Info("ReStartAlarmServer報(bào)警連接成功！");
}
catch (System.Threading.ThreadAbortException ex)
{
mLog.Info("ReStartAlarmServer線程已人為終止！" + ex.Message, ex);
}
catch (System.Exception ex)
{
mLog.Error("ReStartAlarmServer開始報(bào)警連接失敗:" + ex.Message, ex);
mLog.Info("ReStartAlarmServer開始重新報(bào)警連接....");
mTimes = 50;
}
finally
{
}
}));
listThread[0].IsBackground = true;
listThread[0].Start();
}
private void AlarmCallBack(IAsyncResult ir)
{
try
{
HttpWebRequest webRequest = (HttpWebRequest)ir.AsyncState;
string salarmUrl = webRequest.Address.OriginalString;
Thread[] alarmThead = dicAlarmUrls[salarmUrl];
HttpWebResponse response = (HttpWebResponse)webRequest.EndGetResponse(ir);
Stream stream = response.GetResponseStream();
alarmThead[1]= new Thread(new ThreadStart(delegate()
{
try
{
byte[] buffer = new byte[mAlarmReadCount];
int count = 0;
string strMsg = "";
int startIndex = -1;
int endIndex = -1;
NormalResponse res = null;
DateTime dtStart = DateTime.Now;
DateTime dtEnd = DateTime.Now;
while (!mIsCloseAlarm)
{
count = stream.Read(buffer, 0, mAlarmReadCount);
if (count > 0)
{
strMsg += Encoding.UTF8.GetString(buffer, 0, count);
startIndex = strMsg.IndexOf("<response>");
endIndex = strMsg.IndexOf("</response>");
string xml = strMsg.Substring(startIndex, endIndex - startIndex + "</response>".Length);
res = HuaweiXMLHelper.GetNormalResponse(xml);
strMsg = strMsg.Substring(endIndex + "</response>".Length);
startIndex = -1;
endIndex = -1;
break;
}
dtEnd = DateTime.Now;
if ((dtEnd - dtStart).TotalSeconds > 10)
{
throw new Exception("連接信息未有獲取到，需要重啟報(bào)警！");
}
}
while (!mIsCloseAlarm)
{
count = stream.Read(buffer, 0, mAlarmReadCount);
if (count > 0)
{
string temp = Encoding.UTF8.GetString(buffer, 0, count);
strMsg += temp;
while (strMsg.Length > 0)
{
if (startIndex == -1)//未發(fā)現(xiàn)第一個(gè)<task-info>
{
startIndex = strMsg.IndexOf("<task-info>");
if (startIndex == -1)
{
if (strMsg.Length >= "<task-info>".Length)
{
strMsg = strMsg.Substring(strMsg.Length - "<task-info>".Length);
}
break;
}
}
if (startIndex >= 0)
{
int i = startIndex + "<task-info>".Length;
int taskInfoEndIndex = strMsg.IndexOf("</task-info>", i);
if (taskInfoEndIndex > 0)//必須有任務(wù)結(jié)束節(jié)點(diǎn)
{
i = taskInfoEndIndex + "</task-info>".Length;
int i1 = strMsg.IndexOf("</attach-rules>", i);//找到軌跡節(jié)點(diǎn)結(jié)束
int i2 = strMsg.IndexOf("</alarm>", i);//找到報(bào)警節(jié)點(diǎn)結(jié)束,發(fā)現(xiàn)一條報(bào)警
if (i1 == -1 && i2 == -1)//沒有標(biāo)志結(jié)束
{
break;
}
else if (i1 >= 0 && (i1 < i2 || i2 == -1))//找到軌跡結(jié)束節(jié)點(diǎn)
{
strMsg = strMsg.Substring(i1 + "</attach-rules>".Length);
startIndex = -1;
endIndex = -1;
continue;
}
else if (i2 > 0 && (i2 < i1 || i1 == -1))//找報(bào)警節(jié)點(diǎn)
{
endIndex = i2;//找到報(bào)警節(jié)點(diǎn)結(jié)束,發(fā)現(xiàn)一條報(bào)警
string alarmXml = "<taskalarm>" + strMsg.Substring(startIndex, endIndex - startIndex + "</alarm>".Length) + "</taskalarm>";
Thread th = new Thread(new ThreadStart(delegate()
{
ParseAlarmXml(alarmXml);
}));
th.IsBackground = true;
th.Start();
strMsg = strMsg.Substring(endIndex + "</alarm>".Length);
startIndex = -1;
endIndex = -1;
continue;
}
}
else
{
break;
}
}
}
}
else
{
Console.WriteLine("##########讀取報(bào)警反饋：無");
Thread.Sleep(1000);
}
}
}
catch (System.Threading.ThreadAbortException ex)
{
mLog.Info("AlarmCallBack...7");
try
{
if (stream != null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
mLog.Info("AlarmCallBack線程已人為終止！--0" + ex.Message, ex);
}
catch(IOException ex)
{
mLog.Info("AlarmCallBack...8");
try
{
if (stream != null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
}
catch (ObjectDisposedException ex)
{
mLog.Info("AlarmCallBack...9");
mLog.Info("AlarmCallBack讀取流已人為終止！--2" + ex.Message, ex);
try
{
if (stream != null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
}
catch (System.Exception ex)
{
mLog.Info("AlarmCallBack...10");
mLog.Error("AlarmCallBack 0:" + ex.Message,ex);
try
{
if (stream != null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
}
finally
{
}
}));
alarmThead[1].IsBackground = true;
alarmThead[1].Start();
}
catch (System.Exception ex)
{
mLog.Info("AlarmCallBack...11");
mLog.Error("AlarmCallBack 1:" + ex.Message,ex);
mLog.Info("AlarmCallBack開始重新報(bào)警連接....3");
mTimes = 50;
}
finally
{
}
}
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。
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